I haven't had the cheeks getting hot part, but I have had weird symptoms that come on all of a sudden & I feel bad for a day or two. It used to be longer, but it's not as bad as it was or else I'm used to it. Anyway, I call them "spells".

Did you have low blood sugar at the time, did you need to eat? Earlier today my face got flushed and hot, I felt a little nauseated and dizzy. I think I forgot to eat lunch because I had a busy day. Once I ate, it took a while, but after about an hour I felt better. Don't know if that is what happened to you, but I thought I would bring it up.
Sometimes I get an anxiety attack also, for no apparent reason, that always makes me feel overheated, nauseated and dizzy. Hope you are feeling better, Kim